Key legal question
Whether the Tribunal Federal could enter into the appeal against the arbitral tribunal's letter of 29 February 2008 as an incidental decision.
Extracted holding
The letter was not a separately notified incidental decision within the meaning of Art. 92-93 LTF and was therefore not immediately appealable.
Extracted reasoning
It was merely an information letter on how the tribunal intended to continue taking evidence; it lacked a formal ruling on competence or recusal, lacked sufficient reasoning, and contained no indication of remedies.